John knowledge of radio just by staying around the radio station.A. caught onB. worked up

发布时间：2020-08-16 10:50:56


John      knowledge of radio just by staying around the radio station.
A. caught on
B. worked up
C. took up
D. picked up

网友回答

A. caught on
B. worked up
C. took up
(答案→)D. picked up
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